Flashing for corrugated buildings



June 9, 1953 o. A. HOWE 2,641,340

FLASHING FOR CORRUGATED BUILDINGS Filed Aug. 15, 1949 INVENTOR BWL? A. :OWE ATTORNEY Patented June ""1"! :TI'JZ'.

UNITED STATES PATENT OFFICER Orville A. Howe, South Afiton, Mo.

Application August 13, 1949, Serial No. 110,045

This invention relates to improvements in flashing corrugated buildings, and more specifically, relates to the flashin of joints between roof and side walls of structures made of corrugated sive from the standpoint of both material and labor required.

An object of this invention is to devise an inexpensive, easily installed flashing between the roof and side walls of corrugated structures, whose appearance will conform to that of the structure.

Another object of this invention is to utilize strips of the corrugated sheet material as a flash- -ing, together with a simple sealing strip.

Another object of this invention is to eliminate hand-forming of flashings, and to achieve a substantial degree of prefabrication.

With these and other objects, which will be evident from this specification, in view, this inven tion consists of the construction and novel combination and arrangement of the parts hereinafter described, illustrated in the accompanying drawings, and set forth in the claims hereto appended. It should be understood that various changes in the form, proportion and detail of construction, within the scope of the claims, may be resorted to without departing from the essence of the invention or sacrificing any of the advantages thereof.

In the drawings:

Fig. 1 is a perspective View of a corner of a corrugated building, illustrating the application of my invention.

Fig. 2 is a sectional view taken along line 2--2 of Fig. 1.

Fig, 3 is a sectional view taken along line 33 of Fig. 2.

Fig. 4 is a sectional view taken along lin 4-4 of Fig. 1.

Fig. 5 is a sectional view taken along line 5-5 of Fig. 4.

I refer to the cave shown at the left in Fig. 1 as the horizontal eave, and that shown to the right as the sloping eave.

3 claims. (01. 189-1) In the drawings, the horizontal cave is that marking the juncture of corrugated sloping roof sheet I I and the vertically corrugated wall sheet I2.

These have similarly spaced corrugations and ar so arranged that the crests l3 and troughs I4 of roof sheet II correspond respectively in lateral position with the outward-extending crests I5 and inward-extending troughs I6 of Wall sheet I2. I

In order to flash the gaps between the upper edge of wall sheet I2 and thelower surface of roof sheet II, I apply a corrugated strip I! of the same material and overlapping wall "sheet I2.

Said strips upper edge I8 is sawed from its out ward-extending crests I9 to its inward-extending troughs 20 (or vice versa) at an angle a, here'- after described. j As shown in Fig. 3, the effect of sawing strip I! at such an angle is to .give' its upper. .edge 18 a somewhat scalloped outline, the size'of such scallops varying with the angle at which sawed. This angular sawing of the corrugated material is the very essence of my invention. Flexible sealing strip 2 I, which may be of building felt or other suitable material, is cut to a corresponding outline and cemented or otherwise adherently attached to and on the inner side of upper edge I8 so that it extends beyond such edge any distance convenient for its function. .I usually permit such sealing strip to extend beyond edge I8 about but the exact amount depends upon the size of corrugationsand, to

some extent, upon the preference of the builder. In use, the flashing strip IT, with sealing strip 2 I mounted thereon, is applied to the joint so that it fits in'the corrugations of wall sheet I2. With sealing strip 2| bent inward against the overlaying roof corrugations, flashing strip I1 is pushed upward so that its crests l9 and troughs 20 along upper edge I8 make a snug joint with the respective crests l3 and troughs I4 of roof sheet II. It is then attached to side wall sheet I2 in any convenient manner as with bolts 22.

Using dimensionally similar sheets for roof and. side walls, and solving for angle a in Fig. 2, I have determined the following simple formula:

slope angle 2 where the slope angle is that angle which the roof makes with the horizontal, and the side Walls are vertical.

For the application of my invention to the sloping eave, reference is made to Figs. 1, 4 and 5.

Wall sheet l2, has outwardly-extending crests I5 and inward-extending troughs l6, being of the same proportions as roof sheet H with its corresponding crests l3 and troughs M.

The average slope between the crests l3 and troughs I4 is not great; in standard corrugated cement-asbestos board the pitch of the corrugations is 4.2" while the depth from crest to trough is only 11 3'", exclusive of material thickness. I have found that" the variation in curvature may be disregarded or su-fficiently compensated for if roof sheet H is so located with reference to side wall sheet l2 that the latter lies approximately one material thickness inwardot midway beneath a crest l3 and a trough M (I assume the alignment of side wall sheet I2 with the dlrection of corrugation, as will follow in all cases where the side walls are normal to the front walls). Flashing strip I1, cut obliquely to correspond witlithe slope of the roof H, is made of the same corrugated material, having crests t9 and troughs 20' adapted to-nest upon the corresponding outward crests 15- and inward troughs W. As with strip H, the upper edge l8 of strip I1 is sawed at an angle a, said angle beingdetermined by insp tion each case, one which-willpermit a-relatively snug fit against the slope of the: overlaying corrugations of root sheet it while nested ever the vertical corrugations of side wall sheet 12-. Having been so fitted, it is attached in place as by bolts 22 or many othercon-venient manner.

In thecase-of 'both horizontaland sloping. eaves, I call: the jcintsbetweemfiashing: strips it and It and: roof sheet H, following ordinary -,cal-T1Is1g practice's From the foregoing description, itis apparent that the flashing stripsemployed, for both the horizontal eaves and the sloping eaves, are essentially extensions of the side walls; their patterns of corrugations being coincidentwith those of the side walls. Therefore, if the upper edges of the sidewall sheets are precisely sawed to the same angular specifications asarehere given for the flashing strips l1 and 17", no separate flashing strips wouldibe' required.

Furthergeneralizing, it is apparent that one essez iifial elementof my invention as applied to horizontal eaves is to so angular-1y saw a corru gated sidewall that its edge will slope in a dime tion opposite'the slope of thereof. Thus, in case of a. root which did not overhang, but instead sloped: backward from a horizontal eave', the roof crests would be alignedlaterally with theinWard extending troughs and the angle of cut would be downward from inside to" outside.

Other changes may also" be" made inthe con:- struction, arrangement and disposition. of the genera various parts of the invention, within the scope of the appended claims, without in any degree departing from the field of the invention, and it is meant to include all such within this application,

Having thus described my invention, what I claim and desire to protect by Letters Patent is:

1. In a building, a vertically corrugated wall element, and a corrugated sloping roof overhanging the Wall element and corrugated to the same pitch amt depth as th9W2ill1 element; the crests of the roof corrugations being aligned with the outward-extending crests of the wall element corrugations, the wall element terminating in a wavy upper. nesting against the corrugated under-surface of the roof and lying entirely in a plane-inclined from the horizontal oppositely to the slope of the roof at an angle equal to 45 minus half the slope of the roof.

a building, a wall, a corrugated sloping roof overhanging the wall, and a flashing strip vertically .corrugate d to the Same pitch and depth as theroot corrugations and secured tothe upper edge of the wall with its outwardentending crests aligned with the crests of the roof corrugations, the said flashing strip having awavy upper margin nesting against the corrugated under-surface of the roof, the said: margin-lying entirely within aplane inclined from thehorizontal oppositely to the slope or"- the rootat an angle equal 12 45 minus half the slope of the roof,

3. In a building, a vertically corrugated wall, a corrugated sloping roof whose corrugations have the same pitch and depth as the wall. corrugations, the crests oithe roof corrugations being aligned with the outwardeextending crests of the wall corrugations, and aiiashing strip secured to the upper edge of the Wall and vertically corrugated to the same pitch and depth as the roof corrugations, the flashing strip portion above the lip-p r e g of the wall having a avy upp r margin nestingv against the corru ated under-surface of the roof, the said flashing upper margin l-yi-ng entirely within a plane inclined from the horizontal oppositely to the-slope of the roof at an angle equalto45 minus half theslepeer thereof.

QRVILLEA, E.

References Cited in the fiIeof patent UNI IED PATENTS 

